Siloxide tripodal ligands as a scaffold for stabilizing lanthanides in the +4 oxidation state.

ABSTRACT: Synthetic strategies to isolate molecular complexes of lanthanides, other than cerium, in the +4 oxidation state remain elusive, with only four complexes of Tb(iv) isolated so far. Herein, we present a new approach for the stabilization of Tb(iv) using a siloxide tripodal trianionic ligand, which allows the control of unwanted ligand rearrangements, while tuning the Ln(iii)/Ln(iv) redox-couple. The Ln(iii) complexes, [Ln^III((OSiPh₂Ar)₃-arene)(THF)₃] (1-Ln^Ph) and [K(toluene){Ln^III((OSiPh₂Ar)₃-arene)(OSiPh₃)}] (2-Ln^Ph) (Ln = Ce, Tb, Pr), of the (HOSiPh₂Ar)₃-arene ligand were prepared. The redox properties of these complexes were compared to those of the Ln(iii)

SUBMITTER: Tricoire M 

PROVIDER: S-EPMC11077534 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature